I am deciding to make a new thread of science problems, which require word problems. In order to answer these questions, you need to write a link which contain these answers, just so everyone can have a go at answering these questions. In the end, whoever has answered the mot questions correctly wins. I shall be writing a problem everyday, starting from tomorrow, 25th December.
Here is an example problem:
A light-emitting diode (LED) is a small solid state device that gives off light when a current passes through it. It is commonly used in clocks to give off a clear red, or sometimes green, digital display.
There is a type of LED in the market that glows red when current flows through it one way, and green when the current flows the other way. An alternating current flows rapidly one way and then the other. What would this LED look like if it were connected to an alternating source?